// CharUtil.isUrlChar treats [ ] as valid URL chars, so they pass through unchanged
        String result = DocumentUtil.encodeUrl("http://example.com/path/[id]/page");
        assertEquals("http://example.com/path/[id]/page", result);
    }

    @Test
    public void test_encodeUrl_percentSign() {
        // CharUtil.isUrlChar treats % as valid URL char, so it passes through unchanged

            final char c = configPath.charAt(i);
            if (c == '\\') {
                buf.append('/');
            } else if (c == ' ') {
                buf.append("%20");
            } else if (CharUtil.isUrlChar(c)) {
                buf.append(c);
            } else {
                try {
                    buf.append(URLEncoder.encode(String.valueOf(c), Constants.UTF_8));

        try {
            final StringBuilder buf = new StringBuilder(path.length() + 100);
            for (int i = 0; i < path.length(); i++) {
                final char c = path.charAt(i);
                if (CharUtil.isUrlChar(c) || c == '^' || c == '{' || c == '}' || c == '|' || c == '\\') {
                    buf.append(c);
                } else {
                    buf.append(URLEncoder.encode(String.valueOf(c), filterPathEncoding));